Remove linux/arm/v7 from publish_docker_image (it does not work)
Remove linux/arm/v7 from publish_docker_image (it does not work)

Context: #568

iphoting/healthchecks,healthchecks/healthchecks,healthchecks/healthchecks,iphoting/healthchecks,healthchecks/healthchecks,iphoting/healthchecks,healthchecks/healthchecks,iphoting/healthchecks